Tap root
The large, central root that grows downwards, and from which smaller, lateral roots grow.
Taxonomy
The practice of classifying plants and animals.
Tender
A term used to describe plants that are unable to stand frost or freezing temperatures.
Tendril
The coiled, cord-like growths (modified stems or leaves) produced by climbing plants, which enable them to attach to supports.
Tepal
A term used when sepals and petals are indistinguishable from one another, because they are similar in size, shape and colour.
Terete
Cylindrical or circular in cross section, but occasionally tapering.
Terminal
The tip or apex of a plant.
Ternate
To be grouped in threes. Having three leaflets, or a leaf that's divided into three parts.
Terrestrial
Plants that grow in the soil, land plants.
Tessellate
Used of leaves or petals having a mosaic-like patterning.